Science worksheets for Class 7 — with answers

Answer the questions.

1. How does an amoeba take in food?
2. Plants like Cuscuta that take food from other plants are called ______.
3. Name the longest part of the alimentary canal.
4. Which animals chew the cud?
5. Lichens are a partnership of ______ and ______.
6. Where is most food absorbed in our body?
7. Where does digestion of food begin in humans?
8. Name the raw materials for photosynthesis.
9. The process by which green plants make food is called ______.
10. Which organ produces bile?

Answer the questions.

1. Why do woollen clothes keep us warm?
2. Heat moves through solids by ______.
3. The normal temperature of the human body is ______.
4. Why does a clinical thermometer have a kink?
5. Why do we wear light-coloured clothes in summer?
6. Name two poor conductors of heat (insulators).
7. A wind blowing from the sea to the land is called a ______.
8. Name the three ways heat travels.
9. How does heat from the Sun reach us?
10. Name two good conductors of heat.

Answer the questions.

1. What colour does blue litmus turn in an acid?
2. Name an acid found in curd.
3. What colour does red litmus turn in a base?
4. The reaction of an acid with a base is called ______.
5. Turmeric turns ______ in a base.
6. Solutions that are neither acidic nor basic are ______.
7. What is formed when an acid reacts with a base?
8. Name a natural indicator.
9. Acids taste ______; bases taste ______.
10. Name a base used to treat acidity in the stomach.

Answer the questions.

1. Name one way to prevent rusting.
2. Coating iron with zinc is called ______.
3. A change in which a new substance is formed is a ______ change.
4. Is burning of paper a physical or a chemical change?
5. Getting large crystals of a substance from its solution is called ______.
6. Is cooking food a physical or a chemical change?
7. Is rusting of iron a physical or a chemical change?
8. Is melting of ice a physical or a chemical change?
9. What gas is formed when vinegar reacts with baking soda?
10. Is tearing paper a physical or a chemical change?

Answer the questions.

1. Blood vessels that carry blood away from the heart are ______.
2. Blood vessels that carry blood to the heart are ______.
3. Which tissue carries water in plants?
4. Which tissue carries food in plants?
5. Loss of water from leaves as vapour is called ______.
6. The red pigment in blood is ______.
7. Respiration without oxygen is called ______ respiration.
8. The kidneys remove waste from blood as ______.
9. How many chambers does the human heart have?
10. How do earthworms breathe?

Answer the questions.

1. A car covers 120 km in 2 hours. Find its speed.
2. The time taken by a pendulum for one oscillation is its ______.
3. What is the SI unit of speed?
4. A bus moves at 50 km/h. How long does it take to cover 200 km?
5. A train moves at 80 km/h for 3 hours. How far does it go?
6. Name two ways people measured time in the past.
7. 1 hour = ______ seconds
8. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
9. Which instrument shows the speed of a vehicle?
10. Which instrument shows the distance covered by a vehicle?

Answer the questions.

1. Draw (or name) the symbol of an electric cell.
2. Name one use of an electromagnet.
3. A safety device that melts when too much current flows is a ______.
4. A coil of wire that becomes a magnet when current flows is an ______.
5. In a circuit, the bulb glows only when the switch is ______.
6. Which effect of current makes an electric bell ring?
7. Two or more cells joined together make a ______.
8. The heating effect of current is used in ______.
9. Why is a CFL or LED better than an ordinary bulb?
10. The wire in a heater is made of ______.

Answer the questions.

1. A spoon’s shiny inside surface acts like a ______ mirror.
2. The image in a plane mirror is ______ and the same size.
3. Name the device that splits white light into seven colours.
4. A lens that is thicker in the middle is a ______ lens.
5. Which lens is used as a magnifying glass?
6. In a plane mirror, your right hand appears as the ______ hand.
7. A lens that is thinner in the middle is a ______ lens.
8. The angle of incidence is ______ to the angle of reflection.
9. Name a natural example of white light splitting into colours.
10. The splitting of white light into colours is called ______.